Smoke-inspection device



April 16, 1929. R. H. wAGER SMOKE INSPECTION DEVICE Filed Aug. l0, 1926 4 Sheets-Sheet l R. H. WAGER SMOKE INSPECTION DEVICE Filed Aug. 1.0, 1926 4 Sheets-Sheet u W i //U u d n 9 /m 7g p 6 p ,y 4 wie 0 l a Q Q QW /J 5 4 7 e E 4 o n w/U 4 df E 4 f. 7 7 WH 0 u 0% .J ,EL .H HHWHWH HHH HHHHHHV- 1. 4 Ur l-: 11-1 7 mw..,....1.H T....||.,.|.Hf.HHummm--Il, |1\,-l| W W0 6 2i f 9 Q f,@! Hw,.- H i April 146, 1929.

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R. H. WAGER SMOKE INSPECTION BEVICE Filed Aug. lO, 1926 4 SheetsSheet 4 @.w-Ww

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FMKE-INSPECTIOM MENGE.

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'llhe invention relates to improvements in devices applied to boilers and the like for the purpose o visually inspecting the smoke discharged therefrom, and such invention has reference specically to inspection devices ot the type having a vision tube connected with the smoke uptake or other smoke containing portion ot the boiler, said tube being provided at its outer end with an elbow having a mirror and a transparent panel, the latter closing the light inlet ot the elbow against entrance ot smoke, while the mirror serves to receive light rays trom said inlet and re- Fect them through the light outlet ot the elhow. lllhese rays in some instances, are directed to a remote point by an extension tube or tubes and one or more mirrors, but this is not always necessary.

Regardless ot the number ot mirrors used, accurate adjustment must be made to seteach mirror in proper relation with the associated light inlet and outlet, and it is one aim ot the invention to provide a new and improved mirror mounting means which will permit both accurate and easy mirror setting.

'llhe transparent panel above referred to requires occasional cleaning, as it is subiected to the smoke within the vision tube, and it is a further aim to provide a novel construction permitting temporary movement of the panelinto the elbow and access to the interior ot the latter, permitting effective cleaning ol said panel. n

With the :toregoing in view, the invention resides in the novel subject matter hereinalter described and claimed, the description being supplemented by the accompanying drawings. u n

Fig. 1 is a side elevation showing the 1nvention applied to a boiler.

Fig. 2 is an enlarged vertical sectional view through the outer end ot the vision tube, the elbow connected with said tube, and associated parts, the transparent panel being shown in its. inwardly swung position in dotted lines, while the outwardly swingable door tor the elbow, carrying the mirror, is shown open in dotted lines.

Fig. 8 is a top plan view ot the parts shown in Fig. 2.

Fig.. tlis a vertical transverse sectional view on line t-t ot Fig. 2.

ig. 5 is a similar view on the correspondingly numbered line oit Fig. 2.

Fig. 6 is a detail sectionalview showing one of the fasteners tor the carrying traine ot the transparent panel.

7 is a detail section on line 7-7 et' Fig. 8 is a sectional view showing a dill'- terent -torni ot' construction.

Fig. 9 is a top plan view ot the construction shown in Fig. 8.

Fig. 10 is a sectional view similar to Fig. 8 but showing the door o1E the elbow out'- wardly swung and illustrating the latter swung outwardly with its transparent panel, permitting cleaning or the latter.

ln the torni ot construction shown in Figs. 1 to 7, 1l designates a vision tube lmounted at one side ot the smoke uptake 12 ot a boiler 18, said tube being, in the present disclosure, in alineinent with another tube 1d at the opposite side or the uptake 12 and containing an illuminating bulb (not shown). llt the outer end of the tube 11, a casing is shown in the torni ot an elbow 15, said casing1 being provided with a light ray inlet 16 suitably coupled to said tube 11, and with a light ray outlet 17 ot any desired contour. rllhe outer peripheral portion of' the elbow 15 is preterably straight and is formed with a door opening 18 normally closed by a door 19. rllliis door carries a mirror 20 which is adapted to receive light rays from the tube 11 and reidect them through the light outlet 17. 'llhese redected rays may be received by the eye directly at the outlet 17 or below the latter, or extension tubing 2l and mirror-containing elbows 22 may be connected with said outlet 17 for directing the rays of light from the mirror 2U to a remote point. bViouSly, the detail shape and construction of the outlet 17 will vary as occasion may demand and the same may be said 01: the inlet 16. ln tne present showing, this inlet is threaded internally to receive the outer end ot the tube ll, and any desired means such as a lock-nut 23 may he provided to lock the elbow and tube against relative turning when once properly set. The outlet 17 is shown in the form of an internally smooth flange into which a tube such as 21 may be slipped and held by set screws or other desired means 24.

'A transparent smoke barrier or panel 25, preferably formed of glass, is mounted to normally swing against and close ,the inlet 16 against entrance of smoke from the vision tube 11, said inlet being preferably in the form of a collar as shown, to receive the adjacent end of said tube. In the present showing this anel 25 is held by a s ring ring 26 in a suita le frame 27, the latter ing located within the elbow 15 and being hin ed to the latter at its lower side as. at 28. he frame 27 is provided with an appropriate packing 29 which engages'the portion of the elbow around the inlet 16, and to hold said packing tightly in contact with this ortion of the el ow, I prefer to make use of) the fastening means shown most clearly in Figs. 4, 5 and 6. Two bolts 30 are shown passing through the inner end portion of the elbow 15, which portion projects laterally at 31 beyond the inlet 16, the latter being in the form of an annular ange. The inner ends of these bolts are provided with heads 32 which are normally received in recesses 33 in the peripheral portion of the frame 27, as shown in Figs. 5 and 6. Appropriate nuts such as the thumb nuts 34 are threaded onto the outer ends of the bolts 30 and normally draw said bolts and their heads rearwardly to similarly move the frame 27, holding the packing 29 in tight `contact with the elbow 15.` When the nuts are loosened however, the bolts may be rotated so that the heads 32 which are ofeccentric nature, will clear the recesses 33. Then, the frame 27 and the panel 25 may be in wardly swung to the dotted line position of Fig. 2. When this is done, the door 19 and the mirror 2() are of course, outwardly swung to or beyond the dotted line position of the figure referred to. Thus, by reaching into the elbow 15 through the opening 18, the panel 25 may be cleaned of all matter which hasy accumulated thereon while said panel has been, subjected to the smoke within the vision tube 11.

In hingedly mounting the frame 27, I preferably provide the latter with a radially projeeting lug 35 which is received in a depression 36 in the lower portion of the elbow 15, the pivot pin or the like 28 being passed through said lug 'and the sides of the depression.

The door 19 is hingedly mounted upon the elbow 15 and when closed, forms the outer peripheral wall of said elbow. In establishing the hinged connection, the elbow and door are preferably provided with adj aeent lugs 37 and 38, and a hingepin 39 is passed throughthem, said lugs and pin being preferably at the lower end of the door, as clearly shown in Fig. 2.

Any desired means may be employed for normall holding the door 19 in closed position. or this purpose, I preferably make use of an angular arm 40 pivoted at 41 to the outer side of the elbow and provided with a set screw 42, the latter normally engaging the door 19 as shown in Fig. 2. When this set screw is loosened, the arm 40 may be swung aside, permitting the door 19 and the mirror to be outwardly swung. This gives access to the surface of the mirror for cleaning or shining the same and also permits cleaning of the panel 25, when the frame 27 is swung into the elbow 15.

In mounting the mirror 20, I preferably make use of the details of construction shown most clearl in Figs. 2 and 3. ,This mirror is provide with an appropriate carrying frame 43 having a convex boss 44 at its outer side, preferably disposed at the central portion thereof. This boss is received in a flared or concave inner end 45 of an opening 46 which is formed in the door 19, and a suitable stem 47 passes loosely through this opening and is rigidly secured to the boss 45, preferably by being threaded into the latter as disclosed at 48. The outer end of the stem 47 is provided with an enlarged head 49 which is outwardly spaced from the central portion of the door 19, the latter preferably having a boss 50 around the opening 46. Set screws 51 are threaded through the head 49 at points spaced about the stem 47, the inner ends of said set screws cont-acting with bess 50. By properly adjusting these screws 51, it will be seen that the frame 43-and the mirror 20 may be tilted to any proper position, so as to accurately set it with regard to the light inlet 16 and the outlet 17, so as to eausethe rays of light to be projected from the mirror in the proper manner. In addition to serving as adjusting means for the mirror, the set screws 51, when all tightened, cause binding of the boss 44 against the door 19, effectively locking said mirror in the position at which it has been set.

The numbers 52 merely designate plugged openings in the inlet or flange 16, said plugged openings forming no part of the present iuvention and being intended for the introduction into the vision tube 11. of instrmnents for thermally and analytically inspecting the 4 smoke. This subject matter is shown, described and claimed 1n my pending U. S. applleation, Ser. No. 126,579, filed August 2, 1926.

In the form of construction shown 1n Figs. A

portion et the elbow may be downwardly swung to the position ol l? ig. l0, giving access to the transparent panel 25, tor the purpose ol cleaning the latter. Panel 25a is suitably mounted in a trame 25" forming part oit the elbow body l, said trame normally abutting the collar lGa'.

llfith the exception ot the teatures to which attention has been specifically directed, the construction shown in Figs. r8, 49 and l0, is substantially a duplicate ot that previously described and further detailed explanation will not theretore be given. The mirror how ever is designated at and its mounting and adjusting means at 51a. lt this point, it may be statedthat this same mirror mountn ing and adjusting'means is preferably einployed in each ot the elbows 22 and the latter may or may not be provided with outwardly swingable doors or the like carrying said mounting means.

@n account ot eiristing'advantages lor the details-ot construction herein disclosed, such details are preferably followed. However, within the scope ot the invention as claimed, various changes may be made.

l. ln a smoke inspection device, a casing having a light inlet passage and a light outlet passage disposed at an angle to each other, said casing also having a door tor giving access to its interior, a mirror in the casing tor receiving light rays from the inlet and redecting them through the outlet, said mirror being carried by said door and being aecessible for cleaning when the door is opened, a transparent panel closing said light inlet against entrance of smoke, and releasable means normally holding said panel in operative position but permitting movement thereol into the casing to give access to said panel for cleaning when said door is opened.

2. ln a smoke inspection devi-ce, a casing in the form ot an elbow, said casing having a light inlet at one end, a light outlet at its other end and a door opening between its ends, a transparent panel normally closing said light inlet against entrance ot smoke, means hingedly mounting said panel 'for inward swinging into the casing to a position at which its outer side is accessible through said door opening for cleaning, rcleasable means for normally holding said panel in operative position. and a hinged door normally closing said door opening, said door being provided with a mirror t'or receiving light rays from said inlet and reflecting them through sai-d outlet, said mirror being accessible for cleaning when the door is opened. I

3. ln a smoke inspection device having a casing termed with a light inlet and a light outlet, a transparent panel across said inlet to prevent entrance ot smoke therethrough, and a mirror at an angle to the aires ot the lll light inlet and the light outlet tor receiving light rays trom said inlet and reflecting them through said outlet; means mounting said panel for inward movement trom its normal position into the casing, and means for giving access to the interior ot said casing to pern mit cleaning of the inwardly moved panel.

t. ln a smoke inspection device, a casing in the torni oli an elbow, said casing having a light inlet at one end, a light outlet at its other end and a door opening between its ends, a mirror at an angle to the aires of the light inlet and the light outlet tor receiving light rays trom said inlet and redecting them through said outlet, a transparent panel normally closing said light inlet against entrance ot smoke, means hingedly mounting said panel tor inward swinging into the casing to a position at which its outer side is accessible through said door opening tor cleaning, releasable means tor normally holding said panel in operative position, and a hinged door normally closing said door opening.

5. ln a smoke inspection device, a casing in the torni ot an elbow having a light inlet at one end, a light outlet at its other end and an opening in its peripheral portion between said inlet and outlet, said opening being concave at its inner end, a mirror in the casing to receive light rays from the inlet and redect them through the outlet, said mirror having a convex boss on its back engaging said concave inner end ot said opening, a stem projecting rigidly from said boss and passing loosely through said opening, the outer end ot said stem having an enlarged head, and set screws threaded through said head at points spaced about said stem, said set screws contacting with the outer side ot the casing for adjusting the stem and mirror to accurately set the lattery with respect to the light inlet and outlet. l

tl. A smoke inspection device comprising a vision tube t'or connection to a smoke passage, a casing having a light inlet and a light outlet at an angle to each other, the former being disposed in communication with said tube, said casing being provided with a mirrorcarrying door between the inlet and outlet, a transparent smoke barrier closing said light inlet against entrance o't` smoke from the vision tube and thus protecting the mirror against the same, and hinge means permit ting swinging ot the barrier away `from the vision tube to allow cleaning ot' its smokef lacing side, the other side of said barrier and the mirror being accessible for cleaning when the aforesaid door is opened.

ln a smoke inspection device, an elbow having a light inlet collar at one end for conneetion with a smoke-containing vision tube, the other end of the elbow being formed with a light outlet, said elbow being provided be tween its ends with a mirror-carrying door, a

frame normally abutting the end of said light .inlet collar toward said mirror-carrying door,

` a transparent barrier carried by said frame to ting swinging of said fra-me and barrier away.

from said collar to permit cleaning of the smoke-facing side of said barrier, the other side of the barrler and the mirror being accessible for cleaning when the aforesaid door is opened.

In testimony whereof I have hereunto affixed my signature.

ROBERT HUDSON WAGER. 

